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def definition def or abbrev

isSuperposition

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formal statement (Lean)

  67def isSuperposition {n : ℕ} (ψ : QuantumState n) : Prop :=

proof body

Definition body.

  68  ∃ i j : Fin n, i ≠ j ∧ ψ.amplitudes i ≠ 0 ∧ ψ.amplitudes j ≠ 0
  69
  70/-- A definite state: exactly one basis state has non-zero amplitude. -/

depends on (15)

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